Help C# : reconnect char ?

Hello ,
do we must make a new socket and reconnect socket to can respawn char or we can make it with out close or reconnect socket , any code can help pls .?

Depends on how many gameserver the server has and how they are setup. You will notice it.

It does not matter how many gameservers are running. An AgentServer holds your connection to whatever GameServer is responsible for the region your character is in.
TL;DR: You don't need to reconnect when respawning.